wp-admin/includes/deprecated.php:188Unregister a setting
$option_groupstring$option_namestring$sanitize_callbackcallableoptional''function remove_option_update_handler( $option_group, $option_name, $sanitize_callback = '' ) { _deprecated_function( __FUNCTION__, '3.0.0', 'unregister_setting()' ); unregister_setting( $option_group, $option_name, $sanitize_callback );}Introduced in 2.7.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/deprecated.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.